diff --git a/RedPandaIDE/compiler/stdincompiler.cpp b/RedPandaIDE/compiler/stdincompiler.cpp
index 8238c6c5..083802a4 100644
--- a/RedPandaIDE/compiler/stdincompiler.cpp
+++ b/RedPandaIDE/compiler/stdincompiler.cpp
@@ -21,12 +21,19 @@
 #include <QTextCodec>
 #include "qt_utils/charsetinfo.h"
 
+static int counter=0;
 StdinCompiler::StdinCompiler(const QString &filename,const QByteArray& encoding, const QString& content,bool silent, bool onlyCheckSyntax):
     Compiler(filename,silent, onlyCheckSyntax),
     mContent(content),
     mEncoding(encoding)
 {
+    counter++;
+}
 
+StdinCompiler::~StdinCompiler()
+{
+    counter--;
+    qDebug()<<"stdin compiler exited: "<<counter;
 }
 
 bool StdinCompiler::prepareForCompile()
diff --git a/RedPandaIDE/compiler/stdincompiler.h b/RedPandaIDE/compiler/stdincompiler.h
index e27cf68f..b381dc99 100644
--- a/RedPandaIDE/compiler/stdincompiler.h
+++ b/RedPandaIDE/compiler/stdincompiler.h
@@ -25,6 +25,7 @@ class StdinCompiler : public Compiler
 
 public:
     explicit StdinCompiler(const QString& filename, const QByteArray& encoding, const QString& content, bool silent,bool onlyCheckSyntax);
+    ~StdinCompiler();
 
 protected:
     bool prepareForCompile() override;
diff --git a/RedPandaIDE/widgets/functiontooltipwidget.cpp b/RedPandaIDE/widgets/functiontooltipwidget.cpp
index 96c1e82b..23ec790b 100644
--- a/RedPandaIDE/widgets/functiontooltipwidget.cpp
+++ b/RedPandaIDE/widgets/functiontooltipwidget.cpp
@@ -37,6 +37,7 @@ FunctionTooltipWidget::FunctionTooltipWidget(QWidget *parent) :
     mDownButton->setArrowType(Qt::DownArrow);
     mDownButton->setFixedSize(16, 16);
     mDownButton->setAutoRaise(true);
+    mInfoIndex=0;
 
     this->setLayout(new QHBoxLayout());
     layout()->setContentsMargins(0,0,0,0);
@@ -65,6 +66,7 @@ void FunctionTooltipWidget::addTip(const QString &name, const QString& fullname,
 
 void FunctionTooltipWidget::clearTips()
 {
+    mInfoIndex=0;
     mInfos.clear();
     hide();
 }